Features & details EXPANDABLE & CARRY ON SIZE: Dimension:17*7*12inch This slim travel backpack with expandable feature offers you more packing capacity. Unzipping to get 27L storage then can easily hold packing cubes, make-up bag, outfits, camera bag and gear, etc. It fits overhead and under seat while on state of standard carry on size, is ideal for men, women, weekend traveler. This versatile luggage backpack also meets airline carry-on requirements, for airlines such as Easy Jet, Spirit, Jet Blue CONVERTIBLE DESIGN: The carry on backpack is designed with hideaway padded shoulder straps which can be easily stored away in zippered back panel, transforming this vacation backpack from carry-on duffel to briefcase style and provide you a more flexible carrying experience. A luggage strap on the back is designed to fit on luggage/suitcase, for easier carry on international travel or cruise. A great gifts for people who travel